Had a wall great and high - An almighty defense.
Twelve gates - A gate for every tribe of Israel, in the vicinity of which gate that tribe dwelt; so that in coming in and going out they did not mix with each other. This description of the city is partly taken from Ezekiel 48:30-35.
In Synopsis Sohar, p. 115, n. 27, it is said: "In the palace of the world to come there are twelve gates, each of which is inscribed with one of the twelve tribes, as that of Reuben, of Simeon, etc.: he, therefore, who is of the tribe of Reuben is received into none of the twelve gates but his own; and so of the rest."
Other Adam Clarke entries containing Revelation 21:12:
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